Separator or grader.



PATENTED OCT. 18, 190 G. T. ROWLAND & L. P. LONGMGRE.

SBPARATOR-OR GRADER.

APPLICATION FILED JULY 17, 1901.

N0 MODEL IIIIIIIIflIIII IIIIIIIQ zdz l'izesses. 3am yaw/m autumn-Arum!nAourv 1 wnumi Anna. L "a. co, :0

J No. 772,377.

UNITED STATES Patented October 18, 1904.

PATENT OFFICE.

CHARLES T. ROWLAND AND LEWIS- F. LONGMORE, OF LOWELL, MASSA- CHUSETTS;SAID LONGMORE ASSIGNOR TO SAID ROWLAND.

SEPARATOR OR GRADER.

SPECIFICATION forming part of Letters Patent No. 772,377, dated October18, 1904.

Application filed July 17, 1901.

T0 aZZ whom it may concern:

Be it known that we, CHARLES T. ROWLAND and LEWIS F.LONGlW[ORE,Cll3iZQI1S of the United States, residing in Lowell, in the .county ofMiddlesex and Commonwealth of Massachusetts, have invented a certain newand useful Improvement in Separators or Graders, of which the followingis a specification.

This invention relates to separators and graders such as are used forseparating granular materials according to the size of the particles orgrains, and is adapted to be used upon separators or graders for varioussubstances, as wheat, coal, crushed ores, and others.

The object of this invention is to remove the dust or refuse matters andto deliver the valuable materials, separated according to their finenessor coarseness, at a single operation with only one handling of thematerial.

The separator or grader comprises two or more trunks or tubes arrangedin a suitable case and laterally filling said case and each having aninclined upper screen-surface of perforated or foraminous material, onwhich the granular material is thrown and down which the particles toocoarse to pass through the screen are carried by their own gravity,falling upon a similar screen-su rface of another trunk, and so onfromtrunk to trunk until the material from the last screen-surface isdischarged therefrom. One such trunk may beused to separate dust fromcoarser particles, and where a series of such trunks are. used two ormore trunks may have a screen-surface of the same fineness of mesh toserve thepurpose of a single trunk with a longer screensurface. Wepreferably assist the operation by a current created by a suction-fanapplied to the lower end of each trunk, and from the fan the dust orother material which falls or is drawn through the screen may bedischarged into dust-rooms or other suitable rooms or receptacles.

In the accompanying drawings, Figure 1 is a view from a point slightlyabove and in front of a separator and grader of the same, the front ofthe case being removed and the hopper being partly in vertical sectionon the.

Serial No. 68,573.' (No model.)

line 1 1 in Fig. 2; Fig. 2, a side elevation of the same; Fig. 3, anelevation of the operative face of the break-piece; Fig. 4, a centralvertical longitudinal section of a suction-fan, as on the line A 4 inFig. 1.

The case A is a box,preferably of metal, but not necessarily, having aremovable front a secured to the body of said case in any convenientwell-known manner, as by bolts B, fastened to the sides of the case andprojecting through holes in said front, and nuts 5, turning on the outerends of said bolts against said front. A hopper C is supported on thetop of the case and communicates with the case, and through this hopperare introduced to the case the matters to be separated-or screened. Thefront and back of the case preferably form the sides of the trunks D D DD Df, hereinafter described. Each of said trunks is preferably of sheetor plate metal and is inclined downwardfrom one side nearly to the otherof the case A and then inclined back to the other side of said case,passing through the same side of the case from which it starts anddischarging outside of the case, except the lower trunk D of the series,which discharges from the opposite side of the case from the side atwhich it starts. The upper trunk D starts at the side a of the case anddescends toward the side a and is provided on the top of said inclinedportion with a screen-surface d, which may be formed by perforating saidtop or by making said top of wire-cloth or in any usual manner; Theinclination of this screen-surface is about thirty degrees, but may bemore or less. The inclination should be such that that the mattersplaced upon the screen will descend said screen and fall from the lowerend thereof, allowing the finer particles to fall through the meshes ofsaid screen. The matters too coarse to fall through the screen will bytheir own momentum be carried against the break-piece E, which has asurface covered with pyramidal points a; which will cause the softersubstances,like pieces of dried mud or clay,to be broken or reduced tosmaller pieces. That which falls from the screensurface of the firsttrunk will drop onto a similar surface 03 of the next trunk D and inlike manner will fall from the screen-surface (1 against anotherbreak-piece, E, then upon the screen-surface (Z of the trunk D andagainst the break-piece E then over the screen-surface (Z of the trunk Dthen against the break-piece E and upon the screen-surface a? of thetrunk that is to say, such of these matters as do not fall'through anyof the screen-surfaces into the trunks, said screensurfaces beingsuccessively coarser or having fans. In Fig. l the lower end of eachtrunk is shown connected to one of these fans.

We claim as our invention The combination of two or more successivelyarranged oppositely inclined trunks, each having a screen-surface on itsupper side, adapted to discharge matters placed thereon and coarser thanthe meshes of such screen upon the next following screen, andbreak-pieces, having points and arranged between successivescrcen-surfaces, to be struck by and to reduce matters discharged fromone screen-surface to the next.

In testimony whereof we have afiixed our signatures in presence of twowitnesses.

CHARLES T. ROWLAND. LEWIs F. LONGMORE.

W itn esses:

ALBERT M. MooRE, GEORGE P. MADDEN.

